In the given reaction sequence, conversion of Acetophenone (\( C_6H_5COCH_3 \)) to Ethylbenzene (\( C_6H_5CH_2CH_3 \)) is an example of:
\[
\text{CH}_3\text{COC/}
\]
\[
\text{Anhy. AlCl}_3 \xrightarrow{\text{X}} \xrightarrow{\text{(1) N}_2\text{H}_4} Y
\]
\[
\Delta \xrightarrow{\text{(2) KOH / glycol}}
\]